/Engine/Plugins/Experimental/Mutable/Source/CustomizableObjectEditor/Classes/MuCOE/Nodes/CustomizableObjectNodeMaterial.h
Allow only one connection to a single BaseObjec node. There can be multiple conections to NodeCopyMaterial nodes.
virtual void BreakExistingConnectionsPostConnection ( [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * InputPin, [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * OutputPin )